The scale height of giant molecular clouds is less than that of smaller clouds

被引：35
|
作者：
Stark, AA
Lee, Y
机构：
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[2] Korea Astron Observ, Taeduk Radio Astron Observ, Taejon 305348, South Korea
来源：
ASTROPHYSICAL JOURNAL | 2005年 / 619卷 / 02期
关键词：
Galaxy : structure; ISM : clouds; ISM : molecules;
D O I：
10.1086/427936
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
An antenna temperature thresholding algorithm is used on the Bell Laboratories (CO)-C-13 J = 1 --> 0 Milky Way Survey to create a catalog of 1400 molecular clouds. Of these, 281 clouds are selected for having well- determined kinematic distances. The scale height, luminosity, internal velocity dispersion, and size of the cloud sample are analyzed to show that clouds smaller than similar to10(5.5) M-. have a scale height which is about 35 pc, roughly independent of cloud mass, while larger clouds, the giant molecular clouds, have a reduced scale height which declines with increasing cloud mass.
引用
收藏
页码：L159 / L162
页数：4
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